FFmpeg
Data Fields
CELPFContext Struct Reference

#include <celp_filters.h>

Data Fields

void(* celp_lp_synthesis_filterf )(float *out, const float *filter_coeffs, const float *in, int buffer_length, int filter_length)
 LP synthesis filter. More...
 
void(* celp_lp_zero_synthesis_filterf )(float *out, const float *filter_coeffs, const float *in, int buffer_length, int filter_length)
 LP zero synthesis filter. More...
 

Detailed Description

Definition at line 28 of file celp_filters.h.

Field Documentation

void(* CELPFContext::celp_lp_synthesis_filterf) (float *out, const float *filter_coeffs, const float *in, int buffer_length, int filter_length)

LP synthesis filter.

Parameters
[out]outpointer to output buffer
  • the array out[-filter_length, -1] must contain the previous result of this filter
filter_coeffsfilter coefficients.
ininput signal
buffer_lengthamount of data to process
filter_lengthfilter length (10 for 10th order LP filter). Must be greater than 4 and even.
Note
Output buffer must contain filter_length samples of past speech data before pointer.

Routine applies 1/A(z) filter to given speech data.

Definition at line 45 of file celp_filters.h.

Referenced by ff_celp_filter_init(), ff_celp_filter_init_mips(), hb_synthesis(), postfilter(), synthesis(), and tilt_factor().

void(* CELPFContext::celp_lp_zero_synthesis_filterf) (float *out, const float *filter_coeffs, const float *in, int buffer_length, int filter_length)

LP zero synthesis filter.

Parameters
[out]outpointer to output buffer
filter_coeffsfilter coefficients.
ininput signal
  • the array in[-filter_length, -1] must contain the previous input of this filter
buffer_lengthamount of data to process (should be a multiple of eight)
filter_lengthfilter length (10 for 10th order LP filter; should be a multiple of two)
Note
Output buffer must contain filter_length samples of past speech data before pointer.

Routine applies A(z) filter to given speech data.

Definition at line 65 of file celp_filters.h.

Referenced by ff_celp_filter_init(), ff_celp_filter_init_mips(), and postfilter().


The documentation for this struct was generated from the following file: